The document defines and explains the key elements of the coordinate plane, including the x and y axes which intersect at the origin (0,0) to form four quadrants. Points on the plane are represented by coordinates (x,y) and are plotted by starting at the origin and moving right along the x-axis and up/down along the y-axis. The quadrants are numbered I through IV based on whether the x and y values are positive or negative.

1. Coordinate Plane

2. X & Y axes Two number lines that meet each other at 0 at 90 o angles.

3. X & Y axes x y

4. Origin The place where the axes cross. Point (0, 0)

5. Origin Origin

6. Points Coordinate 2 dimensional (x, y)

7. Quadrants Each area of the coordinate plane is a quadrant.

8. Quadrants I II III IV

9. Quadrants I (+x, +y) II (-x, +y) III (-x, -y) IV (+x, -y)

10. Quadrants y-axis (0, +/-y) x-axis (+/-x, 0)

11. What Quadrant? (5, 7) (-8, 3) (7, -3) I II IV

12. Plotting Points To plot a single point: Start at the origin. Move across the x coordinate. Move up/down to the y coordinate.

13. Plot a point (-1, -5) x y .

14. Plot a point (3, 2) x y .

15. Plot a point (-4, 4) x y .

16. Review What is a coordinate plane? Name the quadrants. What is the place where the two # lines cross? In what direction are the quadrants named? How do you plot a point?